I want to learn about 8085 microprocessor.So I have a problem about some program.Could you help me to solve the problem??I want to write a small program of 8085. They are: (+) program for keyboard (+) when you press by assembly.Thanks for your help!

 

The 8085 is very old, hard to find, and about as obsolete as a microprocessor can be. It would be worth looking for a microprocessor with modern support, like the 8051.

If you want to try out programming with the 8085, here is a linj to a site with a free virtual 8085 and the assembler for it - http://www.codeproject.com/KB/system/Intel8085Assembler.aspx.